All-digital RF multi-band transmitters for advanced communications systems

先进的无线通信系统需要具有多标准的多频段能力，才能比今天的系统更具普遍性、移动性、灵活性和安全性。这就需要开发软件定义的无线电收发机。到目前为止，人们已经开展了广泛的研究活动来设计这种多频段收发信机的RP前端。本文的主要研究内容是接收机的设计。相反，发射机方面还处于早期的研发阶段。这项研究计划旨在利用最新的半导体器件技术，为先进的通信系统开发创新的全数字射频多频段发射机。目标架构基于开关模式射频功率放大器，使其有可能达到极高的功率效率水平。

Advanced wireless communication systems need to have multi-standard multi-band capabilities to be more ubiquitous, mobile, agile and secure than they are today. This requires the development of software defined radio transceivers. So far, extensive research activities have been carried out to design the RP front-end of such multi-band tranceivers. This preliminary focused on the receiver design. Conversely, the transmitter side still a the early research and development stages. This research proposal aims at developing innovative all-digital RF multi-band transmitters for advanced communication systems using the latest semi-conductor devices technology. The targeted architecture is based on switching-mode RF power amplifiers that makes it possible to attain extremely high power efficiency levels.